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P. B. DELANY.

METHOD OF EFFEOTING ELECTRICAL SYNGHRONOUS MOVEMENTS.

No. 322,691. Patented Jul 21, 1885.

WITNESSES fatrz'ck lifielany By his .dttorne (2/6; C.W

UNITED STATES PATRICK B. DELANY, OF NE\V YORK,

PATENT OFFICE.

N. Y., ASSIGNOR TO THE STAYDARD MULTIPLEX TELEGRAPH COMPANY, OF SAMEPLACE.

EPECIPICATION forming part of Letters Patent No. 322,691, dated July 21,1885.

Application filed August 21, 1884.

To (LZZ whom it may concern:

Be it known that I, PATRICK B. DELANY, of the city, county, and State ofNew York, have invented an Improved Method of Correction of ElectricalSynchronous Movements,

of which the following is a specification.

My invention consists in an improved method of correction ofelectrically-connected synchronously-moving apparatus, by which bothapparatus at the end of the line are simultaneously corrected whenevereither of them runs out of time.

The accompanying drawing is a diagram view illustrating two connectedstations equipped with apparatus for carrying out my invention.

Letters Patent No. 286,278, of October 9, 1 883, fully describes theactuation of the armatore-disk A, on the spindle of which the trailingfinger a, which traverses the table of contacts B, is carried. In thatpatent also the operation of the motor magnet A, the vibrator-magnet A",and the fork A, and the various circuits and attachments are fully andelaborately illustrated and described, and further description isunnecessary, reference being made to said patent for full information asto details.

In Letters Patent No. 286,281, of October 9, 1.883, I have fullydescribed the arrangements of contacts and circuits herein shown, bywhich a correcting impulse of electricity is sent from one station tothe other whenever the apparatus at adistant station runs out of time;and have also described and claimed in said patent the method ofcontrolling the speed of the mechanism at the distant corrected stationby throwing a resistance into or out of the vibrator circuit.

The arrangement of contacts and circuits and group of instruments Vshown in the accompanying drawing are identical with those shown anddescribed in said patent, and do not, therefore, need particulardescription here, as their operation will be obvious upon a mereinspection of the drawing. Thus, if while the trailing finger a atstation X is on the 9 connected with the battery 0 B, the finger atstation Y should be moving fast enough to bring it upon the extended 10,a correcting impulse of electricity would pass from the correcting- (Nomodel.)

battery 0 B through the 9 contact at station X, trailing finger, line,trailing finger at station Y, and 10 contact to the group ofcontrollirig-instruments V, and the resistance R would be shunted or cutout of the vibrator or fork-circuit so as to increase theelectromagnetic power of the fork-magnet in that circuit and slow thespeed of rotation of the trailing finger so that it would drop back intoproper position.

The operation is precisely the same when an impulse is sent from thecorrecting-battery GB at station Y to the group of correctinginstrrnnents V at station X. The correction is therefore reciprocal; andalthough the corrections are shown as acting by retardation, they couldobviously be arranged to act by acceleration, as is fully set forth inthe patent last mentioned.

Thus far the arrangement described is exactly the same as that shown insaid patent. My present invention, however, involves a different methodof operation, and consists in simultaneously correcting the apparatus atboth stations. Thus (having reference to the latter plan) when acorrecting impulse is sent, say, from station X to retard the apparatusat station Y, the same impulse is at station X utilized to acceleratethe instrument at that station, so that a correction of acceleration ati one station and of retardation at the other will act more vigorouslyand promptly to control the instruments.

The operation is the same when a correcting impulse is sent from Y to X,and I will now describe it. \Ve will again suppose that the apparatus atY is running faster than at X, and that a correcting impulse istransmitted, as before described, from the correct- 4 ing-battery O B atX to the group of controlling-instruments at Y to retard the apparatusat Y. The same impulse, however, is made effective atX to accelerate theapparatus there in the following manner: The line from the battery 0 13passes through the coils of a relay, S, and thence to the 9-contact, asshown. The armature of this relay controls a local circuit, in which thecoil of a second relay, '1, is placed.

by the armature of the relay T, normally shunts the resistance 1% out ofthe fork-circuit f, as

A shunt-circuit, 8, controlled Ioo clearly shown in the drawing. ivhen,however, a correcting impulse of electricity from the battery 0 l3energizes the relay S, its armature is drawn to its front stop, itslocal circuit is broken, and the relay T demagnetized, so that itsarmature falls from its front stop, thus breaking the shunt s andcausing the fork-circuitf to run from the local battery L B through theresistance It. This resist ance is therefore thrown into the fork orvibrator circuit whenever a correcting-impulse is sent from the battery0 B. The effect is to reduce the electromagnetic power of the magnet ofthe fork-circuit, which results in a consequent increase of rate ofvibration and increase of speed in the rotation of the trailing finger.The conditions are precisely the same when a correcting impulse is sentfrom station Y to station X. At station Y, however, I have shown asomewhat modified arrangement for accomplishing the same result, inwhich I dispense with a resistance in the controlled forkcircuit f whena correcting impulse of electricity is sent out from that station, bymementarily interrupting said circuit when the armature of the relay Tleaves its front stop. The effect and principle of operationareprecisely the same as at station X. The momentary interruption of thefork-circuit at Y introduces an infinite resistance into the circuit.The decrease in amplitude of the vibration of the fork would be slight,as the interruption of the circuit is but momentary and the normal rateof vibration of the fork would prevent too great a decrease inamplitude.

I have shown different arrangements at each station for the purpose ofconvenience of illustration. In operation, however, it would be betterto have the arrangements alike at both stations. I prefer to operatewith the resistance R, as shown at station X, as I consider this themost cfficient arrangement for practical use. The apparatus may,however, be worked by interruptions of the forlecircuit. Obviously,whenever the apparatus is to be accelerated the fork-circuit may beinterrupt-- ed; and, therefore, if the group of instruments 'V wasarranged to accelerate, the forlrcircnit might be interrupted at thatpoint and the resistance R dispensed with.

Further description is deemed unnecessary.

I have shown my present invention embodied in the form deemed by me bestadapted to the purpose. It may, however, be varied without departingfrom the spirit of my invention, which contemplates, broadly, the methodof operation consisting in simultaneouly correcting at both stations, byacceleration at the station from which the correcting impulse is sent,and by retardation at the distant station, or vice versa.

No claim is made herein to the general on ganization of apparatus, asthat constitutes the subject-matter of my original applicatiomNo.122,054, tiled February 26, 1881, of which this case is a division.

I claim as my invcntion- 1. The method of synchronizing apparatus, whichconsists in sending a correcting impulse of electricity from one stationto a distant station whenever the apparatus run out of synchronism,utilizing said impulse at the distant station to correct the speed ofthe apparatus at that station and simultaneously utilizing the sameimpulse to correct the speed of the apparatus at the station from whichthe impulse is sent out.

2. The method ofsynchronizing electricallyconnected apparatus, whichconsists in inde pendently actuating such apparatus, and then, whenevereither apparatus runs out of time with the other, simultaneouslyretarding the speed ofone apparatus and accelerating that ol the otherto bring them together again.

In testimony whereof I have hereunto subscribed my name.

' PATRICK B. DELANY.

Vitnesses:

XVENDELL GOOD\VIN, \VILrL-mr. A. HAYES, 2d.

Lil

